检索结果-南通市图书馆

轻合金加工技术 1991年第12期19卷 18-23页

作者： w.schütt Lammersdorf 谷凤玲

本文介绍了铝薄板、厚板及铸件固溶加热和淬火用的升降炉及其工作原理。不同的铝合金经过最优化的热处理后,能得到最高的强度。所谓最优化的热处理就是在处理铝合金时能精确地保持技术工艺参数。

关键词：铝合金升降炉热处理炉

在线全文

学校读者我要写书评

暂无评论

德国康复理念及在神经康复领域的应用

中国康复 2024年第4期39卷 246-250页

作者： Paul w.schönle 单春雷刘丽萍潘锦宇刘平勃林格殷格翰霁达(成都)康复医疗中心成都611100 上海交通大学医学院康复研究院上海200025 上海交通大学医学院附属同仁医院上海200336 中医智能康复教育部工程研究中心上海201203 首都医科大学附属北京天坛医院神经病学中心、神经重症医学科北京100061 勃林格殷格翰(上海)健康管理有限公司上海200000

“十四五”国民健康规划提出,为全面推进健康中国建设,要推动预防、治疗、护理、康复有机衔接,形成“病前主动防,病后科学管,跟踪服务不间断”的一体化健康管理服务;要统筹预防、诊疗、康复,优化生命全周期、健康全过程服务。根据2023... 详细信息

“十四五”国民健康规划提出,为全面推进健康中国建设,要推动预防、治疗、护理、康复有机衔接,形成“病前主动防,病后科学管,跟踪服务不间断”的一体化健康管理服务;要统筹预防、诊疗、康复,优化生命全周期、健康全过程服务。根据2023年发布的《中国脑血管病临床管理指南》(第2版)[1],我国现阶段适合推广的脑卒中康复治疗体系是三级康复网络。三级康复可以使患者获得更好的运动功能、日常生活活动(activities of daily living,ADL)能力、生活质量,减少并发症。在卒中康复的临床实施阶段,目前正在制定相关的标准。因此,国外的先进体系对我国的康复事业发展有着重要的借鉴意义。

关键词：神经康复德国康复理念多阶段模式加强监护康复远程康复

DPY19L3 promotes vasculogenicmimicry by its C-mannosyltransferase activity

在线全文

学校读者我要写书评

暂无评论

Oncology Research 2024年第4期32卷 607-614页

作者： HASSAN BAYDOUN YUJI KATO HIROKI KAMO ANNA HÜsch HAYATO MIZUTA RYOTA KAwAHARA SIRO SIMIZU Department of Applied Chemistry Faculty of Science and TechnologyKeio UniversityYokohama223-8522Japan Department of Pharmacy and Biochemistry Faculty of ScienceUniversity of TübingenTübingen72074Germany

C-mannosylation is a post-translational modification that occurs intracellularly in the endoplasmic *** humans,biosynthesis of C-mannosylation in proteins containing thrombospondin type 1 repeat is catalyzed by the DPY19 family;nonetheless,biological functions of protein C-mannosylation are not yet fully understood,especially in tumor *** mimicry(VM)is the formation of fluid-conducting channels by highly invasive and genetically deregulated tumor cells,enabling the tumors to form matrix-embedded vasculogenic structures,containing plasma and blood cells to meet the metabolic demands of rapidly growing *** this study,we focused on DPY19L3,a C-mannosyltransferase,and aimed to unravel its role in *** of DPY19L3 inhibited the formation of VM in HT1080 human fibrosarcoma ***-expression of wild-type DPY19L3 recovered VM formation;however,DPY19L3 isoform2,an enzymatic activity-defect mutant,did not restore it,suggesting that the C-mannosyltransferase activity of DPY19L3 is crucial to its ***,the knockdown of DPY19L3 in MDA-MB-231 breast cancer cells hindered its network formation ***,our findings suggest that DPY19L3 is required for VM formation and stipulate the relevance of C-mannosylation in oncogenesis.

关键词： C-mannosylation Vasculogenic mimicry DPY19L3

Thermophysical properties of the Ni-based alloy Nimonic 80A up to 2400 K

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2006年第5期25卷 529-531页

作者： B.wilthan R.Tanzer w.schützenhfer G.Pottlacher Institute of Experimental Physics Graz University of TechnologyPetersgasse 168010 GrazAustria Bhler Edelstahl GmbH Mariazellerstrasse 258605 KapfenbergAustria

Nimonic 80A is a nickel-chromium alloy which is strengthened by additions of titanium and aluminium. The alloy is used for high temperature, high strength applications. wire shaped Nimonic 80A samples are resistively volume heated as part of a fast capacitor discharge circuit. Time resolved measurements with sub-μs resolution of current through the specimen are performed with a Pearson probe, voltage drop across the specimen is measured with knife-edge contacts and ohmic voltage dividers and the radiance temperature of the sample with a pyrometer. These measurements allow to determine heat of fusion as well as heat capacity and electrical resistivity at initial geometry of Nimonic 80A as a function of temperature in the solid and in the liquid phase up to 2400 K.

关键词： thermophysical properties Nimonic 80A resistivity enthalpy heat capacity latent heat

Endoscopic submucosal dissection and endoscopic mucosal resection for esophageal and gastric lesions:A comparison of procedures

在线全文

学校读者我要写书评

暂无评论

Laparoscopic, Endoscopic and Robotic Surgery 2024年第2期7卷 66-71页

作者： Gustav Holm schæbel Andreas weise Mucha Charlotte Egeland Michael Patrick Achiam Department of Surgery and Transplantation Copenhagen University Hospital RigshospitaletBlegdamsvej 92100 CopenhagenDenmark

Objective Esophageal and gastric lesions are effectively managed with minimally invasive upper endoscopic procedures such as endoscopic mucosa resection(EMR)and endoscopic submucosal dissection(ESD),offering patients alternatives to invasive *** ESD is well established in Eastern Asia,its adoption in Denmark for superficial esophageal cancer is *** study presents real-world data on the feasibility,safety,and hospitalization duration associated with ESD and EMR for esophageal and gastric *** A retrospective analysis was conducted on patients who underwent ESD or EMR at a specialized center in Denmark from October 2016 to June *** on treatment,indication,lesion location,hospitalization duration,procedure duration,specimen size,complications,recurrence,and one-year overall survival were *** comparisons utilized the Mann-whitney U test,independent sample median test,and chi-squared *** The study included 130 patients(144 procedures):72 underwent ESD and 58 underwent *** with EMR,ESD resulted in greater percentages of en bloc and R0 resections(98.8%vs.64.1%,pwere 14.5%for ESD and 23.8%for EMR(p=0.767).The one-year overall survival rates were similar between the groups(95.8%vs.94.8%,p=0.553).Conclusion Both ESD and EMR are safe and viable for treating esophageal and gastric *** offers advantages but requires more time and *** findings support the literature,emphasizing the importance of considering patient-specific factors and surgeon proficiency in selecting the appropriate procedure.

关键词： Endoscopic submucosal dissection Endoscopic mucosa resection Gastroesophageal cancer Real-world data

Degeneration of foundation cushion species induced by ecological constraints can cause massive changes in alpine plant communities

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第4期67卷 789-802页

作者： Jianguo Chen Xufang Chen Lishen Qian Yazhou Zhang Bo Li Honghua Shi Lu Sun Christian schöb Hang Sun Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China College of Resources and Environment Yunnan Agricultural UniversityKunming 650500China Área de Biodiversidad y Conservación Universidad Rey Juan CarlosMóstoles 28933Spain

Foundational cushion plants can re-organize community structures and sustain a prominent proportion of alpine biodiversity,but they are sensitive to climate *** loss of cushion species can have broad consequences for associated *** potential plant community changes with the population dynamics of cushion plants remain,however,*** eight plant communities along a climatic and community successional gradient,we assessed cushion population dynamics,the underlying ecological constraints and hence associated plant community changes in alpine communities dominated by the foundational cushion plant Arenaria *** population dynamics of Arenaria are attributed to ecological constraints at a series of life history *** functions are constrained by increasing associated beneficiary plants;subsequent seedling establishment is constrained by temperature,water and light availability,extreme climate events,and interspecific competition;strong competitive exclusion may accelerate mortality and degeneration of cushion *** with cushion dynamics,species composition,abundance and community structure gradually *** cushion plants completely degenerate,previously cushion-dominated communities shift to relatively stable communities that are overwhelmingly dominated by *** warming may accelerate the degeneration process of *** of this foundational cushion plant will possibly induce massive changes in alpine plant communities and hence ecosystem functions in alpine *** assessment of the population dynamics of foundation species is critical for an effective conservation of alpine biodiversity.

关键词： alpine ecosystem biodiversity change climate change plant community dynamics foundation species global warming population dynamics

Removal of endocrine disrupting chemicals from water through urethane functionalization of microfiltration membranes via electron beam irradiation

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2024年第4期18卷 61-74页

作者： Zahra Niavarani Daniel Breite Muhammad Yasir Vladimir Sedlarik Andrea Prager Nadja schönherr Bernd Abel Roger Gläser Agnes schulze Leibniz Institute of Surface Engineering eV.(IOM) Permoserstrasse 1504318 LeipzigGermany Centre of Polymer Systems University InstituteTomas Bata University in ZlinTrida Tomase Bati 567876001 ZlinCzech Republic Institute of Chemical Technology Leipzig UniversityLinnestrasse 304103 LeipzigGermany

Polyethersulphone(PES)membranes modified with urethane functional groups were prepared through an interfacial reaction using electron beam *** removal of eight endocrine disrupting chemicals(EDCs)was studied using both pristine and functionalized PES *** prepared membranes underwent characterization using several techniques,including attenuated total reflectance-Fourier transform infrared(ATR-FTIR)spectroscopy,scanning electron microscopy,contact angle analysis,and measurements of pure water ***,dynamic adsorption experiments were conducted to evaluate the adsorption mechanism of the prepared membrane toward the eight *** urethane functionalized membranes were hydrophilic(52°contact angle)and maintained a high permeate flux(26000 L/h m^(2) bar)throughout the filtration *** adsorption results demonstrated that the introduction of urethane functional groups on the membranes significantly enhanced the removal efficiency of 17β-estradiol,estriol,bisphenol A,estrone,ethinylestradiol,and *** adsorption loading of 17β-estradiol on the functionalized PES membrane was 6.7±0.7 mg/m^(2),exhibiting a 5-fold increase compared to the unmodified PES *** membranes were successfully regenerated and reused for three adsorption cycles without experiencing any loss of adsorption capacity.

关键词： Surface functionalization Electron beam irradiation Microfiltration Endocrine disrupting chemicals

Superexchange and charge transfer in the nickelate superconductor La_(3)Ni_(2)O_(7) under pressure

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第11期67卷 1-8页

作者： wéi wú Zhihui Luo Dao-Xin Yao Meng wang Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesSchool of PhysicsSun Yat-sen UniversityGuangzhou 510275China

Recently, a bulk nickelate superconductor La_(3)Ni_(2)O_(7) is discovered at pressures with a remarkable high transition temperature T_(c)~ 80 K. Here, we study a Hubbard model with tight-binding parameters derived from ab initio calculations of La_(3)Ni_(2)O_(7),by employing large scale determinant quantum Monte Carlo and cellular dynamical mean-field theory. Our result suggests that the superexchange couplings in this system are comparable to that of cuprates. The system is a charge transfer insulator as the hole concentration becomes four per site at large Hubbard U. Upon hole doping, two low-energy spin-singlet bands emerge in the system exhibiting distinct correlation properties: while the one composed of the out-of-plane Ni-d_(3z^(2)-r^(2)) and O-p_(z) orbitals demonstrates strong antiferromagnetic correlations and narrow effective bandwidth, the in-plane singlet band consisting of the Ni-d_(x^(2)-y^(2)) and O-p_(x)/p_(y) orbitals is in general more itinerant. Over a broad range of hole doping, the doped holes occupy primarily the d_(x^(2)-y^(2)) and p_(x)/p_(y) orbitals, whereas the d_(3z^(2)-r^(2)) and p_(z) orbitals retain underdoped. we propose an effective t-J model to capture the relevant physics and discuss the implications of our result for comprehending the La_(3)Ni_(2)O_(7) superconductivity.

关键词： superconductivity nickelate superconductors Hubbard model superexchange charge transfer insulator quantum Monte Carlo

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.T.Jeong S.w.Lee w.J.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

Distortions in focusing laser pulses due to spatio-temporal couplings:an analytic description

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2024年第3期12卷 20-40页

作者： Klaus Steiniger Fabia Dietrich Daniel Albach Michael Bussmann Arie Irman Markus Loeser Richard Pausch Thomas Püschel Roland Sauerbrey Susanne schöbel Ulrich schramm Mathias Siebold Karl Zeil Alexander Debus Helmholtz-Zentrum Dresden-Rossendorf DresdenGermany CASUS-Center for Advanced Systems Understanding GörlitzGermany Technische Universität Dresden DresdenGermany

In ultra-short laser pulses,small changes in dispersion properties before the final focusing mirror can lead to severe pulse distortions around the focus and therefore to very different pulse properties at the point of laser±matter interaction,yielding unexpected interaction *** mapping between far-and near-field laser properties intricately depends on the spatial and angular dispersion properties as well as the focal *** a focused Gaussian laser pulse under the influence of angular,spatial and group-delay dispersion,we derive analytical expressions for its pulse-front tilt,duration and width from a fully analytic expression for its electric field in the time±space domain obtained with scalar diffraction *** expression is not only valid in and near the focus but also along the entire propagation distance from the focusing mirror to the *** relating angular,spatial and group-delay dispersion before focusing at an off-axis parabola,where they are well measurable,to the respective values in the pulse’s focus are obtained by a ray tracing ***,these formulas are used to show in example setups that the pulse-front tilts of lasers with small initial dispersion can become several tens of degrees larger in the vicinity of the focus while being small directly in the *** formulas derived here provide the analytical foundation for observations previously made in numerical *** numerically simulating Gaussian pulse propagation and measuring properties of the pulse at distances several Rayleigh lengths off the focus,we verify the analytic expressions.

关键词： group-delay dispersion pulse-front tilt spatio-temporal couplings third-order dispersion ultra-short laser pulses